LIAS light – Item Descriptions
LIASlight ItemID: 6522
Usnea glabrescens (Nyl. ex Vain.) Vain.
Characters[*]: | Character States[*]: |
---|---|
global occurrence: | Eurasia – Europe | Americas – North America (incl Mexico) | Arctic |
substrate: | bark, cork, plant surface – trunks, branches, twigs |
life habit: | lichenized (mutualistic with algal photobionts) |
thallus: | fruticose (fruticous), shrub-like, beard-like |
thallus: | continuous, diffuse, effuse |
[th] upper surface: | green(ish) | yellow(ish) (if dull: buff) | yellow(ish) grey | grey(ish) green |
[th upper surface]: | epruinose |
[th marginal and upper surface] specific structures: | present |
[th margin] cilia, cilioid structures: | absent |
[th upper surface] isidia, isidioid structures: | absent |
[th upper surface] soredia, soralia, soralioid structures: | present |
[th] morphol substructures (eg areoles, lobes, branches) width [mm]: | (median) 1.5 |
[th] morphol substructures (eg areoles, squamules): | distantly discontiguous |
[th] morphol substructures (eg areoles, lobes, branches) upper surface: | smooth, plane | verrucose, warted |
ascomata: | absent | present |
ascoma: | apothecial, apothecioid – hymenial |
ascoma [mm]: | (min) 5.0 |
[ascm, if apoth] disc, mazaedium: | plane, flat, flattened, expanded |
[ascm, if apoth] disc, mazaedium: | pruinose |
[ascm, if apoth] disc, mazaedium pruina: | scarce, sparse, fine |
[ascm] paraphyses/-oids: | present |
asci: | lecanoralean |
[asc] tholus: | thickened |
[asc] tholus amyloidity (iodine reaction): | present |
[asc] tholus amyloidity pattern: | amyloid with widening axial body towards the apex (= Lecanora-, Parmelia-, Rinodina-types etc) |
ascospores: | (median) 8.0 |
[asp] septa: | absent – spore lumen unilocular, monolocular |
[asp] pigmentation: | hyaline, colourless |
secondary metabolites: | present |
secondary metabolites: | norstictic acid | psoromic acid | salazinic acid | stictic acid | usnic acid |
primary photobiont: | present |
secondary photobionts (eg in cephalodia): | absent |
primary photobiont: | chlorophytaceous – trebouxiaceous, chlorococcoid |